Obsolete replacement

Hi, 

Apologies for missing this item. I am not sure if it still relevant to you that this question will be answered, However, we are clearing up some open items in our community as others may still find this useful. 

The only difference between the two models are the packing quantify. I believe AD7991YRJZ-1RL have a higher quantity than AD7991YRJZ-1500RLZ which is similar to this product AD7995 Datasheet and Product Info | Analog Devices. 

Thanks,

Jellenie